-al a-a a-b a-i aaa aab aae aaf aag aai aal aam ab- aba abb abe abf abg abi abl abm aea aeb aee aef aeg aei ael aem af- afa afb afe aff afg afi afl afm ag- aga agb age agf agg agi agl agm ai- aia aib aie aif aig aii ail aim al- ala alb ale alf alg ali all alm ama amb ame amf amg ami aml amm baa bab bae baf bag bai bal bam bba bbb bbe bbf bbg bbi bbl bbm be- bea beb bee bef beg bei bel bem bfa bfb bfe bff bfg bfi bfl bfm bga bgb bge bgf bgg bgi bgl bgm bi- bia bib bie bif big bii bil bim bla blb ble blf blg bli bll blm bma bmb bme bmf bmg bmi bml bmm eaa eab eae eaf eag eai eal eam eba ebb ebe ebf ebg ebi ebl ebm eea eeb eee eef eeg eel eem ef- efa efb efe eff efg efi efl efm ega egb ege egf egg egi egl egm eia eib eie eif eig eii eil eim ela elb ele elf elg eli ell elm em- ema emb eme emf emg emi eml emm faa fab fae faf fag fai fal fam fba fbb fbe fbf fbg fbi fbl fbm fea feb fee fef feg fei fel fem ffa ffe fff ffg ffi ffl ffm fga fgb fge fgf fgg fgi fgl fgm fia fib fie fif fig fii fil fim fla flb fle flf flg fli fll flm fma fmb fme fmf fmg fmi fml fmm gaa gab gae gaf gag gai gal gam gba gbe gbf gbg gbi gbl gbm ge- gea geb gee gef geg gei gel gem gfa gfb gfe gff gfi gfl gfm gga ggb ggg ggi ggm gia gib gie gif gig gii gil gim gla glb gle glf glg gli gll glm gma gmb gme gmf gmg gmi gml gmm i-f ia- iaa iab iae iaf iag iai ial iam iba ibb ibe ibf ibg ibi ibl ibm ie- iea iee ief ieg iei iel iem ifa ifb ife iff ifg ifi ifl ifm iga igb ige igf igg igi igl igm iia iib iie iif iii iil iim il- ila ilb ile ilf ilg ili ill ilm im- ima imb ime imf img imi iml imm la- laa lab lae laf lag lai lal lam lba lbb lbe lbf lbg lbi lbl lbm lea leb lee lef leg lei lel lem lfa lfb lfe lff lfg lfi lfl lfm lga lgb lge lgf lgg lgi lgl lgm lia lib lie lif lig lii lil lim lla llb lle llf llg lli lll llm lma lmb lme lmf lmg lmi lml lmm m-f maa mab mae maf mag mai mal mam mba mbb mbe mbf mbg mbi mbl mbm mea meb mee mef meg mei mel mem mfa mfb mfe mff mfg mfi mfl mfm mga mgb mge mgf mgi mgl mgm mi- mia mib mie mif mig mii mil mim mla mlb mle mlf mlg mli mll mlm mma mmb mme mmf mmg mmi mml mmm